Simko, Šimko or Simkó is a surname. Notable people with the surname include: Simko Ahmed (born 1972), Kurdish artist Simko Shikak (1887–1930) Kurdish leader David Simko (born 1954), American racing
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c98bca305d9071887754be93c89f762ef219f4d07ec98e49dfb845ee22ec4. Chain 2 (Bitcoin): anchored in block 953962 (2026-06-16T15:03:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27d5102c-6087-46e5-99e9-043216832964.json and https://artists.proofprofile.net/proofs/artist/27d5102c-6087-46e5-99e9-043216832964.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).